Type-writing machine.



- L. D. BROUGHTON.

TYPE WRITING MACHINE.

APPLICATION FILED NOVAIS, 1911.

Patented July 7, 1914.

WITNESSEEY INVENTOR: (fi

ATTO

vUNITED STATES PAZFENT OFFICE.

LYMAN DAVID BROUGHTON, OF HARTFORD, CONNECTICUT, ASSIGNOR TO UNDER- WOODTYPEWRITER COMPANY, A CORPORATION OF DELAWARE.

TYPE-WRITING MACHINE.

T0 all 'wlwm it may concern:

Be it known that I, LYMAN D. Bnoncn' vVritin Machines, of which thefollowing is a speci cation.

My invention relates to line-l0cking devices and marginal stops fortypewriter car riages.

l have illustrated my improvement as applied to an Underwood frontstrike type writer, illustrated in Patent No. 990,834, dated May 2,1911.

Beneath the fixed front bar which usually carries the scale plate a baris attached which may be of T section, and on the front face of this arecut teeth. In front of this bar is a rock bar, which operates asignaling and locking device for the type keys. On thisroek bar, areslidable stops which have pivoted members arranged to interlock with theteeth of the rack on the first bar, and thus lock the stop in anyposition. Around one of the stops is placed a yoke, which carries atappet to be moved by a cam on the carriage. This yoke is splined on therock bar, and serves to rotate it, and thus operate the signalingmechanism whenever the cam on the carriage passes this stop carrying theyoke. The stop which does not carry the yoke has a projection with a camface, and a stop on he opiosite side of said cam face. On the carriagiisa latch coii ierating with this stop and cameo that the Carriage can hepulled back only as far as the stop, but if-by any means it passesbeyond the. stop, the coiiperating latch on the carriage will ride overthe cam face, and so prevent the. machine from being locked againstoperation. To enable the carriage to pass this stop, the coiiperatinglatch on the carriage is piv Y oted so that it can be readily raised outof the path of the stop. The. stops are so arranged that the handleoperating the lockingmember swings to one side, and a finger rest isconveniently placed near the handle so that the Slop can be released andmoved along with one clasp of the fingers. In one direction the stop canbereleased and adjusted by a single pressure on the handle in saiddirection.

One advantage of my improvement is that the stops are easily moved, thatthey can be Specification of Letters Patent.

Application filed How/ember 13, 1911.

Patented July 7, 1914. Serial No. 659,948.

set in any position whatsoever because the rocking bar and rack bar mayextend entirely across the machine; the rack bar may be easily attachedto almost any machine, and the arrangement. of the tappet on the rockbar enables the operation of the locking mechanism to be much more surethan isordinarily the case.

Other objects and advantages will hereinafter appear.

In the accompanying drawings, Figure l is a perspective view lookingupward from the front of the machine, showing, the stops, rack bar, andadjacent parts. Fig. 2 is a fragmentary view of the left-hand end of themachine, showing how one stop operates the locking mechanism. Fig. 3 isa view of the stops as seen from above. Fig. 4 shows the stops asviewed, from behind when in position on the machine.

In the drawings, pillars 1 at opposite sides of the machine form part ofthe machine frame. On these pillars is mounted a fixed cross bar 2spaced above the pillars by means of blocks In the rear face of thecross bar 2, and extending longitudinally thereof, is a channel 4, inwhich runs a carriage-supporting roller On the front bar 6 of thecarriage is mounted a cam 7 and a righthand marginal stop 8.

On the under face of the bar 2 is held by screws 9, a T-shaped bar 10,which has a tongue 11 seated in a groove in said bar 2, and on the frontface of said T-shaped bar is cut a rack 12. Also supported by said frontbar 2 by means of brackets 13, is a rock bar 14, which carries themarginal stops 15 and 16. These stops are locked by engagement with therack 12 and serve to limit the movement of the carriage in eachdirection.

Iilxtendiny, on opposite sides of the stop 15 is a member which may bein the form of a yoke 17 splined on the rock bar 14 and carrying atappet 18 which cooperates with the cam 7 0n the carriage to ring a belland to operate the mechanism for locking the type keys. The cam on thecarriage comprises a part 19 arranged to slightly depress the tappet 18and rock the bar 14 so as to swing forward an am! 20 attached to therock bar On the lower end of said arm 20 is pivoted a swinging trip 21which normally rests in a notch in a lever 24 which carries the clapper25 of a bell 26. When chine completely locked the limit of its movementto the left. On

arm is swung forward by the tappet 18 as described, the trip 21 ridesover a projection 23, cumming the forward end of the lever 24 downward.This movement momentarily raises the clapper and causes the bell to berung. The carriage, in its further movement, brings a projection 27 ofthe cam 7 over the tappet 18, and this causes a further movement of thearm 20 which is thereby swung into the position shown in Fig. 2, whereit has moved rock arm 27 on shaft 28 to bring lockin bar 29 under hooks30 of the keys 31, an thus .prevent'their being depressed. If it isdesired to write a few more charactersya .button 32 may be pressed, thuscamming the arm 20 to one side, and carrying the'pin 36 clear of rockarm 27. This releases the locking member 29 and again permits the keysto be depressed. On further movement of'the carriage, a portion 34 ofthe cam comes over the tappet and again locks the keys, and a ledge 35on the stop 7 strikes against a projection 36 on stop 15 to prevent anfurther movement of carriage whatsoever, t us holding the mawith thecarriage at I the stop 16 is a projection 37 which is adapted to strikeagainst a latch 38 on the front bar 6 of the carriage in its movementtoward the right, and thus limit the righthand margin. This latch may beraised by a handle 39 to clear said projection, and thus extend thewriting to any desired point. A cam surface 40 is provided on the sideof said projection 37, so that in its letter-feeding movement, thecarriage will cause the latch 38 to ride down beneath said projection37, and permit the latch to pass the stop. The stops 15 and stated, areslidable along bar 14. They embrace said bar, but rotate easily aroundit,

and each has pivoted thereon by means of a screw 41, a horizontallyswinging arm 42,

which carries teeth 43 forming a dog adapted to lock in the teeth 12 ofthe T-shaped bar 11. The arm 42 may extend laterally and rearwardly fromits pivot, as shown at 4,4, in order to provide a good bearing for thepin 41, and it may work in the horizontal plane of the rack bar and infront thereof,

' the whole devic'c making a compact structure. On each swinging arm 42is a handle 45, whereby the arm may be swung clear of the rack 12. Onthebody of each stop 15,

- 16, is mounted a plate 46 carrying a finger rest 47, enabling thefingers to readily clasp the handles 45, and move the sto s along to anydesired position. The swinging arms 42 are automatically sprung intoengagement with the teeth 12 by means of springs 48. The stops 15 and 16extend rearwardly neath the T-shaped bar 10, and thence upwardly andforwardly to embrace the rear flange 49 of said bar. The front of each16, as has been stop is likewise extended upwardly and rearwardly toform a shelf 51 covering the teeth 12 of said bar. Thus each stop formsa channel 50 to receive the bar 10. Collars 52 are fast on the rock bar14, in order to hold it from sliding, and a fiat surface 53 of said barpermits the yoke 17 to slide along it and yet positively throw it. Onthe return of the carriage, the locking mechanism is released, and thebell ringing mechanism reset by means of a spring 54 whic swings the arm20 into the swinging trip 21 rides over the tion'23.

, It will be seen, therefore, that my invention furnishes a simpleconstruction in which the stops can be quickly adjusted and the artsreadily replaced if injured, or adde to machines of existingconstruction.

Variations may be resorted to Within the scope of the invention, andportions of the improvements may be used without others.

Having thus described my invention, I claim:

1. In a typewriter, the combination of a carriage, a rock bar, a secondbar havin teeth on onevertical face, right and 1e t hand margin stopseach embracing both of said bars, said rock bar being rotatable in saidstops, a swinging member on each stop, and a tooth on each swingingmember to engage with said toothed bar to hold the stop.

2. In a typewriter, the combination with a rock bar, of a rack barhaving teeth out on its vertical face, stops each embracing both of saidbars, members pivoted to said stops and swinging in a horizontal lane,teeth on said members to engage said rack .to hold the stops adjusted,handles for swingin' said pivoted members, springs holding sai teethengaged, and a yoke splined on the rock bar embracing one of said stopsto be moved by the carriage to swing said bar.

3. In-a typewriting'machine, the combination .With a traveling carriage,of a rock bar adjacent said carriage, a stop slidable on and rotatablearound said bar, a yoke embracing said stop and 'splined on said bar, atrack on the frame on which said carriage runs, a toothed bar underlyingsaid track and having a bearing-substantially throughout its length onthe under surface of said track, teeth on the face of said toothed baradjacent said stop, and a tooth pivoted on said stop to swing in theplane in which it is slidable and arranged to lock said stop by saidrack.

4. In a typewriter, the'combination of a carriage, a rock bar moved bythe carriage, a T-shaped bar having teeth in the vertical face of onemember thereof, right and left hand margin stops, each embracing bothbars and adjustable along substantially the whole length of said rockbar, teeth in said stops to engage in said T-shaped bar to holdprojecstop, to permit the release and advance thereof by the applicationof a single manual impulse to said handle.

15. in a typewriting machine having a front bar on which the carriage isarranged to travel, an inverted Tshaped bar depending from said frontbar and having vertical teeth forming a rack on its forward face, a stopslidalily engaging said T-shaped bar, a rock bar loosely supporting saidstop in ad- I Vance of said rack. said stop having a dog 1 mountedtherein by a vertical pivot, said i dog, swinging to and from said rackin the 1 horizontal plane thereof, and a forwardly extending operating:handle on said do;' to be swung in the directi n of travel of said stop,to permit the release and advance thereof by the application of a singleman ual impulse to said handle.

16. In a typcwriting machine having a front bar on which the carriage isarranged to travel, an inverted T shaped bar depending from said frontbar and having vertical teeth forming a rack on its forward face, a stopslida ily engaging said T-shaped bar. a. rock bar snp 'iortingg' said stop in advance of said rack, said stop having a dog mount ed therein by avertical pivot, said dog swinging to and from said rack in thehorizontal plane thercof. a forwartilly extending operating handle onsaid dog to be swung in the direction of travel of said stop, to permitthe release and advance thereof by the application of a single manualimpulse to said handle, and a tappet-carrying niein ber mounted on saidroclt' bar to rock therewith.

17. in a ty 'iewritingf machine having a front bar on which the carriageis arranged I to travel, an inverted Tshapcd bar attached to anddepending from said front bar and having vertical teeth forn'iing a rackon its forward face, a stop slidably engaging said v T-shaped bar, arock bar supporting; said stop in advance of said rack, said step havinga (log mounted therein by a vertical pivot, said dog swinging: to andfrom said rack in the horizontal plane thereof a for t wardly extendingoperating handle on said l dog to be swung in the direction of travel ofsaid stop, to permit the release and advance thereof by the. applicationof a single manual impulse to said handle, and a tappetcarrying membersphned to said rock bar to rock therewith. l

18. In a typewriting machine having a l front bar on which the carriageis arranged to travel, an inverted T-shaped bar depending: from saidfront bar and having vertical teeth forming a rack on its forward face,a stop slidahly engaging said T-shaped bar, a. ro l: liar supportingsaid stop in advance of said rack, said stop having a dog mountedtherein by a vertical pivot, said do e swinging to and from said rack inthe horizontal plane thereof, a forwardly extending opcrating handle onsaid dog to be swung in the direction of travel of said stop, toperniit' the release and advance thereof by the application of a singlemanual impulse to said handle. and a tappet-carrying member localizedwith said stop on said rock bar, and adapted to rock with said bar.

13?. In a rypewriting machine, the combination with a travelingcarriage, of a rock liar adja ent wi l carriage, a stop slidable 0n andrt.=tat'alile around said bar, a member splined on said l ar and movablethereon with said stop, an inverted T-shaped rack bar attached to theframe of the machine having teeth tacinr forwardly toward said rocltbar, said stop having a dog mounted therein by a vertical pivot. saiddog swinging: to and from said rack in the horizontal plane there f, anda forwardly extending operating handle on said dog to be swung in thedirection of travel of said stop, to permit the release and advancethereof by the application of a single manual impulse to said handle Ina, typewriting machine, the con hination with a traveling carriage, of arock bar adjacent said carriage, a pair of stops each slidahle on androtatable around said bar, a member splined on said bar and movablethereon with one of said stops, an invertcd Tshaped rack bar on theframe of the machine having; teeth facing forwardly toward said reekbar, each stop having a dog: mounted therein by a. vertical pivot, saiddog swinging to and from said rack in the horizontal plane thereof, anda. forwardly extending itiperating handle on said dog to be swung in thedirection of travel of: said st p to permit the release and advancethereof by thirapplication of a single manual impulse to said handle.

LYMAN DAVID BROUGHTON.

Witnesses W. M. DYORKMAN, FRANK A, COOK.

